Eren is a titan.
Reiner is the armored titan
Bertolt is the colossal titan
Annie is the female titan
Ymir is the monster titan
The walls surrounding the city are full of giant titans (you'll see it later on when one of the walls get damaged).
Anon is the god of titans

I read what anon wrote, but to be honest it makes so little sense to me I can't even call them spoilers. Actually it just seems like nonsense. I'm not going to think about it too hard though.

Anyways as far as the anime goes, the only thing I'm certain of is that Eren is going to not only bust out of the Titan but gain something as well, probably something to do with their regenerative abilities. And this was all guess work and deductive abilities I picked up from watching Hyouka and Sherlock Holmes. Am I any anywhere in the ballpark?